A method for phase reconstruction in optical three-dimensional shape measurement

作者：Qiao Nao Sheng^*; He Zhi

来源：Chinese Physics B, 2012, 21(9): 094203.

DOI：10.1088/1674-1056/21/9/094203

• phase reconstruction
• optical three-dimensional shape measurement
• measurement precision

In optical three-dimensional shape measurement, a method of improving the measurement precision for phase reconstruction without phase unwrapping is analyzed in detail. Intensities of any five consecutive pixels that lie in the x-axis direction of the phase domain are given. Partial derivatives of the phase function in the x- and y-axis directions are obtained with a phase-shifting mechanism, the origin of which is analysed. Furthermore, to avoid phase unwrapping in the phaser econstruction, we derive the gradient of the phase function and perform a two-dimensional integral along the x- and y-axis directions. The reconstructed phase can be obtained directly by performing numerical integration, and thus it is of great convenience for phase reconstruction. Finally, the results of numerical simulations and practical experiments verify the correctness of the proposed method.

• 出版日期2012-9
• 单位湖南文理学院